如何使用 openXML C# 将文件 excel 行和 sheet 特定行读取到数据 table 中

Question

如何使用 open XML C# 将 excel 行和 sheet 特定行读取到数据中 table?

Answer 1

好的，您需要执行两件事：

1. 获取所需的工作表对象
2. 获取所需的单元格，即 B31，以从中读取数据

这是按名称获取工作表对象和按地址获取单元格对象的代码片段：

Private Function GetWorksheet(ByRef document As SpreadsheetDocument, ByVal worksheetName As String) As Worksheet
    Dim sheets As IEnumerable(Of Sheet) = document.WorkbookPart.Workbook.Descendants(Of Sheet)().Where(Function(s) s.Name = worksheetName)
    If (sheets.Count = 0) Then
        ' The specified worksheet does not exist.
        Return Nothing
    End If
    Dim worksheetPart As WorksheetPart = CType(document.WorkbookPart.GetPartById(sheets.First.Id), WorksheetPart)

    Return worksheetPart.Worksheet
End Function

Private Function GetCellByAdrress(ByRef ws As Worksheet, addressName As String) As Cell

    Dim sheetData As SheetData = ws.GetFirstChild(Of SheetData)()
    Dim cell As Cell = Nothing

    Dim rowNumber As UInt32 = GetRowIndex(addressName)
    Dim row As Row = GetRow(sheetData, rowNumber)

    ' If the cell you need already exists, return it.
    ' If there is not a cell with the specified column name, insert one.  
    Dim refCell As Cell = row.Elements(Of Cell)().Where(Function(c) c.CellReference.Value = addressName).FirstOrDefault()
    'refCell.Remove()
    If refCell IsNot Nothing Then
        cell = refCell
    Else
        cell = CreateCell(row, addressName)
    End If
    Return cell
End Function

Private Function GetRowIndex(ByVal address As String) As UInt32
    Dim rowPart As String
    Dim l As UInt32
    Dim result As UInt32 = 0

    For i As Integer = 0 To address.Length - 1
        If UInt32.TryParse(address.Substring(i, 1), l) Then
            rowPart = address.Substring(i, address.Length - i)
            If UInt32.TryParse(rowPart, l) Then
                result = l
                Exit For
            End If
        End If
    Next
    Return result
End Function

 Private Function GetRow(ByRef wsData As SheetData, ByVal rowIndex As UInt32) As Row
    Dim row = wsData.Elements(Of Row)().Where(Function(r) r.RowIndex.Value = rowIndex).FirstOrDefault()
    If row Is Nothing Then
        row = New Row()
        row.RowIndex = rowIndex
        wsData.Append(row)
    End If
    Return row
End Function

Private Function CreateCell(row As Row, address As [String]) As Cell
    Dim cellResult As Cell
    Dim refCell As Cell = Nothing

    ' Cells must be in sequential order according to CellReference. 
    ' Determine where to insert the new cell.
    For Each cell As Cell In row.Elements(Of Cell)()
        If String.Compare(cell.CellReference.Value, address, True) > 0 Then
            refCell = cell
            Exit For
        End If
    Next

    cellResult = New Cell()
    cellResult.CellReference = address

    row.InsertBefore(cellResult, refCell)

    Return cellResult
End Function

使用函数的代码：

Function ReadCellValue(address as string, worksheetName as string)    


    dim worksheet = GetWorksheet(docObj, worksheetName)

    dim cellObj as Cell = GetCellByAdrress(worksheet, "B31")
    if cellObj isnot Nothing
    dim value  = cellObj.CellValue
    end if

 End Function

希望这会有所帮助。如果有任何歧义，请告诉我。

Answer 2

using DocumentFormat.OpenXml;
using DocumentFormat.OpenXml.Packaging;
using DocumentFormat.OpenXml.Spreadsheet;

        private void readExcel(Stream file)
        {
            String sheetName = "Sheet2";
            String delimiter = ";";
            int startColumn = 2;// 2 convert to B 
            int endColumn = 6; // read until column 6
            int startRow = 31; // start read from row 31

            String columnRequest = "Request";
            DataTable dt = new DataTable();
            dt.Columns.Add(columnRequest);
            DataRow dr;
            String stringRequest = "";
            String stringNopek = "Init";
            String value = "";
            int indexRow = 0;
            using (SpreadsheetDocument myDoc = SpreadsheetDocument.Open(file, false))
            {
                WorkbookPart wbPart = myDoc.WorkbookPart;

                indexRow = startRow;
                while (!stringNopek.Equals(""))
                {
                    stringNopek = getCellValue(GetExcelColumnName(startColumn) + indexRow.ToString(), sheetName, wbPart).Trim();
                    stringRequest = stringNopek;
                    if (!stringNopek.Equals(""))
                    {
                        dr = dt.NewRow();
                        for (int i = startColumn + 1; i <= endColumn; i++)
                        {
                            value = getCellValue(GetExcelColumnName(i) + indexRow.ToString(), sheetName, wbPart).Trim();
                            stringRequest += delimiter + value;
                        }
                        dr[columnRequest] = stringRequest;
                        dt.Rows.Add(dr);
                    }
                    indexRow++;
                }
            }

            Session["DataTableRequest"] = dt;

            string output = "";
            for (int i = 0; i < dt.Rows.Count; i++)
            {
                output = output + dt.Rows[i][columnRequest].ToString();
                output += (i < dt.Rows.Count) ? Environment.NewLine : string.Empty;
            }

        }

private string GetExcelColumnName(int columnNumber)
        {
            int dividend = columnNumber;
            string columnName = String.Empty;
            int modulo;

            while (dividend > 0)
            {
                modulo = (dividend - 1) % 26;
                columnName = Convert.ToChar(65 + modulo).ToString() + columnName;
                dividend = (int)((dividend - modulo) / 26);
            }

            return columnName;
        }

 private int ColumnIndex(string reference)
        {
            int ci = 0;
            reference = reference.ToUpper();
            for (int ix = 0; ix < reference.Length && reference[ix] >= 'A'; ix++)
                ci = (ci * 26) + ((int)reference[ix] - 64);
            return ci;
        }

private String getCellValue(String cellReference, String sheetName, WorkbookPart wbPart)
        {
            Sheet theSheet = wbPart.Workbook.Descendants<Sheet>().
              Where(s => s.Name == sheetName).FirstOrDefault();
            if (theSheet == null)
            {
                throw new ArgumentException(sheetName);
            }
            WorksheetPart wsPart =
                (WorksheetPart)(wbPart.GetPartById(theSheet.Id));
            Cell theCell = wsPart.Worksheet.Descendants<Cell>().
              Where(c => c.CellReference == cellReference).FirstOrDefault();

            String value = "";

            if (theCell != null)
            {
                if (theCell.CellValue != null)
                {
                    value = theCell.CellValue.Text;
                }
                else
                {
                    value = value = theCell.InnerText;
                }
                if (theCell.DataType != null)
                {
                    switch (theCell.DataType.Value)
                    {
                        case CellValues.SharedString:

                            var stringTable =
                                wbPart.GetPartsOfType<SharedStringTablePart>()
                                .FirstOrDefault();
                            if (stringTable != null)
                            {
                                value =
                                    stringTable.SharedStringTable
                                    .ElementAt(int.Parse(value)).InnerText;
                            }
                            break;

                        case CellValues.Boolean:
                            switch (value)
                            {
                                case "0":
                                    value = "FALSE";
                                    break;
                                default:
                                    value = "TRUE";
                                    break;
                            }
                            break;
                    }
                }
            }

            return value;
        }

 protected void UploadControl_FileUploadComplete(object sender, FileUploadCompleteEventArgs e){
 Stream strm = e.UploadedFile.FileContent;
readExcel(strm);
}